Alert archive / Maryland / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 33, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 14, 2010, 9:45 PM EDT for Caroline County, Talbot County, Maryland; Sussex County, Delaware. It was in force for 60 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 14, 2010, 9:45 PM EDT (01:45 UTC)
- Expired
- May 14, 2010, 10:45 PM EDT
- In force
- 60 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Sussex County, DE, Caroline County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 19 km from the middle of the area, began a volume at 01:45 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 14, 9:59 PM EDT | TSTM WND GST 60 | 9 Se Georgetown, DE | LARGE LIMBS DOWN. |
| May 14, 10:15 PM EDT | HAIL 0.5 | Millville, DE | DIME SIZE HAIL. |
| May 14, 10:21 PM EDT | TSTM WND GST 46 | Dewey Beach, DE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 14, 3:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 1.8 hours before the alert went out and 89 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 825 J/kg
- Mixed-layer CIN
- -152 J/kg
- Mixed-layer LCL
- 1318 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 196 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
872
WUUS51 KPHI 150145
SVRPHI
DEC005-MDC011-041-150245-
/O.NEW.KPHI.SV.W.0033.100515T0145Z-100515T0245Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
945 PM EDT FRI MAY 14 2010
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN CAROLINE COUNTY IN EASTERN MARYLAND...
EAST CENTRAL TALBOT COUNTY IN EASTERN MARYLAND...
SUSSEX COUNTY IN SOUTHERN DELAWARE...
THIS INCLUDES THE CITY OF GEORGETOWN...
* UNTIL 1045 PM EDT
* AT 941 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
FEDERALSBURG...OR 15 MILES SOUTHEAST OF EASTON...AND MOVING EAST AT
30 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SEAFORD AND 6 MILES SOUTH OF BRIDGEVILLE AROUND 1000 PM EDT...
SYCAMORE AROUND 1015 PM EDT...
GEORGETOWN AROUND 1025 PM EDT...
MILLSBORO AROUND 1035 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY
AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3858 7572 3865 7572 3869 7583 3869 7590
3867 7595 3864 7596 3865 7608 3886 7589
3885 7573 3883 7572 3884 7555 3883 7527
3879 7513 3881 7508 3867 7505 3850 7505
TIME...MOT...LOC 0145Z 273DEG 28KT 3867 7578
$$
HAYES1 follow-up statement
496
WWUS51 KPHI 150241
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1041 PM EDT FRI MAY 14 2010
DEC005-MDC011-041-150252-
/O.EXP.KPHI.SV.W.0033.000000T0000Z-100515T0245Z/
CAROLINE MD-TALBOT MD-SUSSEX DE-
1041 PM EDT FRI MAY 14 2010
...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX...EAST CENTRAL TALBOT
AND SOUTHERN CAROLINE COUNTIES WILL EXPIRE AT 1045 PM EDT...
LAT...LON 3858 7572 3865 7572 3869 7583 3869 7590
3867 7595 3864 7596 3865 7608 3886 7589
3885 7573 3883 7572 3884 7555 3883 7527
3879 7513 3881 7508 3867 7505 3850 7505
TIME...MOT...LOC 0242Z 273DEG 28KT 3865 7521
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 8:04 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 56 min |
| May 14, 8:49 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 56 min |
| May 14, 9:05 PM EDT | Special Weather Statement | PHI | New Castle | 55 min |
| May 14, 9:06 PM EDT | Special Weather Statement | PHI | New Castle | 54 min |
| May 14, 9:57 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 48 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2010Severe Thunderstorm Warnings in Delaware, 2010Every severe thunderstorm warning in 2010
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.